you can show how to write the latex code using code space,
`\[\Huge \color{red}{\mathbb{I ♥ Latex}}\]`
which gives you
\[\Huge \color{red}{\mathbb{I ♥ Latex}}\]
you can bring code space by writing the code between two ` 's.

@Falco276 in order to make different colored hearts you have to make multiple commands side by side...for example:
`\(\huge \color{blue}{♥}\)` `\(\huge \color{red}{♥}\)` `\(\huge \color{green}{♥}\)`
all of them should be side by side by side by side...that will make a long string to alternate sizes you simmply change the size in each heart

You are not bound by those colour specifications either; hexadecimal colours are a valid option as well for more variety.
Hexadecimal is a number system using base 16, so that we have these digits: 1 2 3 4 5 6 7 8 9 A(10) B(11) C(12) D(13) E(14) F(15).
You can specify any colour by its three values for RGB: Red[0-255], Green[0-255], and Blue[0-255]. In hexadecimal, this is from 00-FF instead of 0-255.
The hexadecimal number is just like this: #RRGGBB Where RR, GG, and BB are the values of 00-FF for each respective colour. Here are some examples.
\( \color{#FF0000}{\#FF0000} \) Red
\( \color{#AA0000}{\#AA0000} \) Slightly darker red (AA < FF)
\( \color{#600000}{\#600000} \) Darker yet (60 < AA < FF)
\( \color{#AAAA00}{\#AAAA00} \) A yellow colour (combining Red + Green)
\( \color{#AAAAAA}{\#AAAAAA} \) Gray; the closer all three numbers are, the less saturation total and the more gray it looks. The higher all three numbers are, the generally lighter the colour is as well.